Automatic cut-off



Jan. 19 192s. 1,570,00? N. E. RICHARDSON AUTOMATI C CUT-OFF Filed August e, 1923 Patented Jan. 19, 1926.

UNITED sTArEa NOVA E. RICHARDSON, OF KANSAS CITY, MISSOURI.

AUTOMATIC oUroFF.

Application illed August 6, 1923. Serial No. 655,995.

To all whom it may concern.'

Be it known that I, Nova E. RICHARDSON, a citizen of the United States, residing at Kansas City, in the county of Jackson and Il State of Missouri, have invented certain new and useful Improvements in Automatic Cut- Ofls, of which the following is a specification.

My invention relates to automatic feed 1o pipe cut offs for oil burners and my object is to provide a simple, inexpensive and eficient device of this character which will positively cut off the flow of liquid fuel to the burner in the event that the flame becomes extinguished and permits the unconsumed oil to overflow. i

The device may be applied to any form of oil burner and, broadly speaking, embodies a valve for the feed line, and mech- 2o anism actuated by the overflow oil for positively closing said valve before the overflow oil becomes a source of danger.

In order that the invention may be fully understood, reference will now be had to the accompanying drawing, in which:

Fig. 1 is a side elevation of an oil burner equipped with the device.

Fig. 2 is a detail plan view of the device with the receptacle and overflow pipe relo moved.

Fig. 3 is an enlarged longitudinal section of the valve.

Fig. 4 is an enlarged broken detail of a portion of the device.

Referring now in detail to the various parts, 2 designates a. burner of any ordinary or preferred type provided with a feed pipe 4 and an overflow pipe 6. The feed pipe 4 leads from any suitable source of liquidy fuel supply, not shown, and is equipped With a valve 8 for controlling the flow of oil to the burner 2. The valve 8 has a valve plug 10 with bevel portions 12 and 14 adapted to alternately engage seats 16 and 18, respectively, in the valve casing. When the valve plug 10 is in contact with the seat 16 it efectually cuts oil' the flow of oil to the burner 2, and when in contact with the seat 18 permits the oil to flow to the burner but prevents it from leaking around the bonnet 2() and the threaded stem 22, which latter projects outwardly from the valve plug 10 through a stuilingbox 24.

26 designates an arm fixedly mounted upon the outer end of the valve stem 22 and provided at one end with a weight 36 and having its other end extending between the links 30 to which it is connected by a pivot 38. The hammer 32 is normally supported in raised position by the lower end of the lever 34, resting upon the arm 26, as best shown by Fig. 4. IVhen the feed pipe 4 extends in other than a horizontal plane as shown, the casing of the valve 6 maybe adjusted to the angle of said feed pipe 4 without changing the normally horizontal position of the arm 26, by loosening the bonnet 2() and turning the valve casing without turning the stem 22.

40 designates a receptacle which is connected to the weighted end of the hammer 32 by a chain or cable 42 which runs through a T-fitting 44 fixed to the discharge end of the overflow pipe 6. The cable 42 is pro vided with a fixedly mounted stop 46 to limit the downward movement of the receptable 40 when the hammer 32 is tripped, by contacting the upper end of the T-iitting 44.

The operation briefly stated is as follows: Oil is lfed to the burner 2 in the usual manner through the feed pipe 4. Should the flame at the burner become accidently extinguished and thus permit the unconsumed oil to escape through the overflow pipe 6, such overflow oil will run into the receptacle 40 and move the same downwardly until checked by the stop 46 contacting the top of the T-fitting 44. The downward movement of the receptacle 4() overbalances the upwardly raised lever 34 through the intermediacy of the chain 42. As the lever 34 becomes unbalanced it swings downwardly and the impact from its weighted end 36 contacting the weighted end 28 of the arm 26 causes said arm to swing from the full line to the dotted line position, Fig. l, and close the valve 8, thereby shutting' of the flow of oil to the burner 2 and eliminating the dangerous consequence likely to arise from the unrestricted flow of oil through the pipe 6.

While I have shown and described the device in connection with an oil burner, it is to be understood that it may be used in conlll Patent, is:

In combination with a liquid fue] burner having a feed pipe and an overflow pipe, a valve connected to said feed pipe, an arm fixed upon the valve stein, a Weight fixed to said arm, links connected to said arm, a hammer pivotallv connected to said links and adapted to swing downwardly and impinge against the weight on the arm to effeet closing of the valve, and mechanism associated with the burner for actuating the hammer.

In testinmny whereof, I affix my signature.

NOVA E. RICHARDSON. 

